HTTP/1.1 503 Service Unavailable
Cache-Control: no-cache
Connection: close
%Content-Length: %CONTENT_LENGTH
Sozu-Id: %SOZU_ID

<h1>MyCluster: 503 Service Unavailable</h1>
<p>No server seems to be alive, could not redirect request %SOZU_ID.</p>
<pre>
%DETAILS
<pre>